One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(9,10,12,14)(11,15,16,13)(17,18)(19,29)(20,30)(21,26)(22,27)(23,28)(24,31)(25,32)(2,5)(6,8)(9,11)(10,13)(12,16)(14,15)(17,18)(19,30)(20,29)(21,26)(22,27)(23,28)(24,32)(25,31) involution — undirected(10,14)(11,16)(17,19,21,31,23,20,22,32)(18,24,27,29,28,25,26,30)(1,3,4,7)(2,6,5,8)(10,14)(13,15)(17,20,22,31,23,19,21,32)(18,25,26,29,28,24,27,30)(2,5)(6,8)(10,14)(13,15)(17,21,23,22)(18,26,28,27)(19,31,20,32)(24,30,25,29)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.